Hmmm...interesting behavior ​@HbvdH . Sounds like you’re using M365 auth for email? Can you just re-token it and see if it works more consistently?

I suggest you open a support case. I had the same problem a few months ago, and support solved it.

I also assume that you have to re-token it since the footprints may not be included (consistently) in the config backup file.

Please also check your FW policies to avoid any kind of block actions.

I have seen when restoring configuration backups depending on what you are using for email (in your case M365) you need to click that Authorize now link to fix things.  Many above have mentioned this as well and I have seen it recently.  Otherwise Support should be able to assist.

When I re-authorize it works for about a day, then the same warnings.

Well I did re-authorize today, test mail went fine and showing Token is valid, we wil see tomorrow.

Ah ok...so you did re-auth. Yeah...then probably Support is your best route ​@HbvdH . Keep us posted how it goes.

Best.

Do you know what support did?

You will need to contact support as each case would be slightly different.  Let us know what they say.

Today the same as yesterday, token authorization required, now switched to smtp email, and everything is responsive now. Will wait if this breaks too tomorrow.

What did support say about the issue?  Hopefully SMTP works well.

Thanks for the update ​@HbvdH